MrCool Olympus Series User manual

Please read this manual carefully before installation and keep it for future reference.
Please keep this manual where the operator can easily find it. Inside, you
will find helpful hints on how to use and maintain your unit properly.
For more info visit www.mrcool.com
User Manual
Olympus Series
Mid-Static Duct Air Handlers

Contents
Page 1 mrcool.com
Safety Precautions
Warnings ............................................................................................................................... 2
Cautions ................................................................................................................................ 3
Part Names .................................................................................................................... 4
Operating Instructions ......................................................................................... 5
Maintenance ................................................................................................................ 7
Troubleshooting ......................................................................................................... 9
EU Disposal Guidelines .......................................................................................... 13
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2
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5

Page 2
Safety Precautions
mrcool.com
Read Before Using
Incorrect usage may cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
CAUTION
This symbol indicates that ignoring instructions may cause death or serious injury.
This symbol indicates that ignoring instructions may cause moderate injury
to your person, damage to your unit, or other property.
This symbol indicates that you should NEVER perform the indicated action.
!
Safety Precautions
WARNING
1.
2.
3.
4.
DO NOT modify the length of the power supply cord or use an extension cord to power the unit.
DO NOT share the electrical circuit with other appliances. Improper or insufficient power supply can
cause fire or electrical shock.
DO NOT expose your body directly to the cool air for prolonged periods of time.
DO NOT insert fingers or foreign objects into air inlet / outlet vents.
DO NOT attempt to repair, relocate, or modify the unit yourself. Always contact your qualified service
professional if any of this is required.
DO NOT allow combustible materials within 3 feet (1 meter ) of unit; or store combustible gas / vapor
emitting materials (e.g. gas cans, rags used with solvents) within the same enclosed area as operating
unit.
DO NOT allow children to play with the air conditioner. Children should be supervised around the unit at
all times.
Installation must be performed by an authorized technician according to installation instructions.
Improper installation may cause water leakage, electrical shock, or fire.
In North America, installation must be performed in accordance with the requirement of NEC and CEC
(by authorized personnel only.) Contact an authorized service technician for repair or maintenance of the
unit.
This appliance is not intended for use by children under the age of 8, or persons with reduced physical,
sensory or mental capabilities, unless they are supervised or have been given instruction concerning safe
usage and understand the hazards involved by a person responsible for their safety.
In the event of any abnormalities, such as the smell of burning, immediately turn off power to the unit
and contact an authorized service technician.

Safety Precautions
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CAUTION
DO NOT touch switches with a wet hand. It may cause electric shock.
DO NOT use the device for any other purpose than the intended use.
DO NOT expose plants or animals directly to the airflow.
DO NOT place food, precision instruments, plants, animals, paint, etc. on the unit.
DO NOT clean the interior unit with water.
DO NOT use combustible cleaning agents as this could cause fire or deformation.
DO NOT place burning objects near the unit or directly in the path of its airflow.
DO NOT step on or place objects on exterior unit.
DO NOT allow unit to run for extended periods with doors and/or windows open or in extreme
humidity.
If the unit is to be used in conjunction with other heaters, the air should be refreshed periodically,
otherwise there is a risk of reduced oxygen.
Switch unit off during storms to avoid electrical damage.
On the interior unit, check that the drainage line is correctly connected to avoid leakage.
On the exterior unit, check that condensation water can run off unhindered to avoid damage.
The unit must be earthed (grounded) in accordance with local codes.
For electrical safety, we recommend that you install an earth leakage circuit-breaker.
If the power cable is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.
1.
2.
3.
4.
5.
6.
7.
Note about Flourinated Gasses:
1.
2.
3.
4.
5.
6.
This air-conditioning unit contains flourinated gases.
For specific information on the type of gas and the amount, please refer to the relevant label on the
unit itself.
Installation, service, maintenance and repair of this unit must be performed by a certified technician.
Product recycling must be performed by a certified technician.
If the system has a leak-detection system installed, it should be checked for leaks at least every 12
months.
Keep a record of all leak checks for the lifetime of the unit.

Installation Summary
Page 4
mrcool.com
1
Part Names
8
9
10
M
Wire Controller
(on some models)
Air Filter
(on some models)
Air Inlet
(side and rear)
Air Outlet
Electric
Control
Cabinet
Connecting
Pipe
Air Inlet
Drain
Pipe
Air
Outlet
Air Inlet
INDOOR UNIT OUTDOOR UNIT
OUTDOOR UNIT
NOTE
All the pictures in this manual are for explanation purposes only. They may be slightly different
from the unit you purchased (depending on model). The actual shape may vary.
PRE-DEF indicator(cooling and heating type)
or fan only indicator(cooling only type)
Infrared signal receiver
Display Digital tube
Operation lamp Timer indicator Alarm indicator
Temporary button
The air conditioner consists of the indoor unit, the outdoor unit, the connecting pipe and the remote control.
Function Indicators On
Indoor Unit Display Panel
• For inverter type, this switch is used for after-sales service
purpose only, the user should not push it.
• For fixed-frequency type, this function is used to operate the unit
temporarily in case you misplace the remote control or its
batteries are exhausted. Two modes including FORCED AUTO
and FORCED COOL can be selected through the TEMPORARY
BUTTON on the air-in grill control box of the indoor unit. Once
you push this button, the air conditioner will run in such order:
FORCED AUTO, FORCED COOL, OFF, and back to FORCED AUTO.
FORCED AUTO
The OPERATION lamp is lit, and the air conditioner will run under FORCED AUTO mode. The remote control operation is
enabled to operate according to the received signal. (See the Remote Control Manual packaged with the unit for details.
FORCED COOL
The OPERATION lamp flashes, the air conditioner will turn to FORCED AUTO after it is enforced to cool with a wind speed of
HIGH for 30 minutes. The remote control operation is disabled.
OFF
The OPERATION lamp goes off. The air conditioner is OFF while the remote control operation is enabled.

Operating Instructions
Page 5 mrcool.com
• If air conditioner is used outside the above conditions, it may cause the unit to function abnormally.
• The air conditioner may produce condensation when the humidity in elevated in the room. To reduce this
issue, keep the door and windows closed.
2
MODE
Cooling Operation
Heating Operation
(cooling only type
without)
Dry Operation
OUTDOOR
TEMPERATURE
ROOM
TEMPERATURE
32 °F~122°F / 0°C ~ 50°C
5°F~76°F / -15°C ~ 24°C
32 °F~122°F / 0°C ~ 50°C
5 °F~122°F / -15°C ~ 50°C
(for the models with low
temperature cooling system)
62°F ~90°F
(17°C~32°C)
32°F~86°F
(0°C~30°C)
62°F ~90°F
(17°C~32°C)
Operate the unit within the temperature ranges listed in the table below for safe and
efficient operation.
NOTE
Three-Minute Protection Feature Refrigerant Leakage Detection
(Optional)
Power Failure
A protection feature prevents the air conditioner from
being activated for approximately 3 minutes when it
restarts immediately after operation.
With this new technology, the display area will
appear “EC” (if applicable) and the LED
indication lamps continue flashing when the
outdoor unit detects refrigerant leakage.
Power failure during operation will stop the unit
completely.
• The OPERATION lamp on the indoor unit will start
flashing when power is restored.
• To restart operation, push the ON/OFF button on the
remote controller.
• Lightning or a car wireless telephone operating nearby
may cause the unit to malfunction.
Disconnect the unit with the power and then connect
the unit with the power again. Push the ON/OFF button
on the remote control to restart operation.

Operating Instructions
Page 6mrcool.com
HINTS FOR ECONOMICAL OPERATION
The following should be noticed to ensure an economical operation. (Refer to corresponding chapter for details)
• Adjust the air flow direction properly to avoid winding toward your body.
• Adjust the room temperature properly to get a comfortable situation and to avoid supercooling and superheating.
• In cooling, close the curtains to avoid direct sunlight.
• To keep cool or warm air in the room, never open doors or windows more often than necessary.
• Set the timer for the desired operating time.
• Never put obstructions near the air outlet or the air inlet; it will cause lower efficiency, even a sudden stop.
• If you don't plan to use the unit for a long time, please disconnect power and remove the batteries from the
remote control. When the power switch is connected, some energy will be consumed, even if the air conditioner
isn't in operation. So please disconnect the power to save energy. And please switch the power on 12 hours before
you restart the unit to ensure a smooth operation.
• A clogged air filter will reduce cooling or heating efficiency, please clean it once two weeks.

Maintenance
Page 7 mrcool.com
3
CAUTION
• Before you clean the air conditioner, be sure the power supply is off.
• Check if the wiring is not broken off or disconnected.
• Use a dry cloth to wipe the indoor unit and remote control.
• A wet cloth may be used to clean the indoor unit if it is very dirty.
• Never use a damp cloth on the remote control.
• Do not use a chemically-treated duster for wiping or leave such material on the unit for long. It could
damage or fade the surface of the unit.
• Do not use benzine, thinner, polishing powder, or similar solvents for cleaning. These may cause the
plastic surface to crack or deform.
Maintenance After A Long Stop Period Cleaning The Air Filter
(eg. at the beginning of the season)
• Check and remove anything that might be blocking
inlet and outlet vents of indoor units and outdoor
units.
• Clean air filters and casings of indoor units. Refer to
"Cleaning the air filter" for details on how to proceed
and make sure to install clean air filters back in the
same position.
• Turn on the power at least 12 hours before
operating the unit in order to ensure smoother
operation. As soon as he power is turned on, the
remote control displays appear.
(on some models)
• The air filter can prevent dust or other particulate
from going inside the unit. When the filter gets dirty,
the air conditioner efficiency decreases.
• Therefore, the filter must be cleaned once every two
weeks during long time usage.
• If the air conditioner is installed in a dusty place,
increase the frequency of air filter cleaning.
• If the accumulated dust is too heavy to be cleaned,
please replace the filter with a new one (replaceable
air filter is optional).
• The filter cleaning should be performed by a suitable
service provider.
If your Air Handler is a rear ventilated unit, please
remove the filter fixed screws（2）and take down the
filter away from the unit.
Maintenance Before A Long Stop Period
(eg. at the end of the season)
• Let the indoor units run in fan only operation for
about half a day in order to dry the interior of the
units.
• Clean air filters and casings of indoor units. Refer to
"Cleaning the air filter" for details on how to proceed
and make sure to install clean air filters back in the
same position.
Fig.3.1

Maintenance
Page 8mrcool.com
Cleaning The Air Filter
Continued.
If your Air Handler is a descensional ventilated unit,
please push the filter up slightly to let the position
retainer escape away from the flange fixed holes, and
take off the filter according to the arrow direction
shows in the following fig.
Clean the air filter (a vacuum cleaner or pure water
may be used to clean the air filter. If the dust
accumulation is too heavy, use a soft brush and mild
detergent to clean it and dry out in cool place) .
After cleaning the air filter, re-install it into the unit.
Reinstall and close the air-in grill in the reverse order
depending on your specific air handler. Reconnect the
control box cables to the corresponding terminators of
the main body .
Fig.3.2
Fig.3.3
Fig.3.4
The air-in side should
face down when
using water.
The air-in side should
face up when using
vacuum cleaner.
CAUTION
Do not dry out the air filter under direct
sunshine or with fire.

Troubleshooting 4
Page 9 mrcool.com
Procedure Problem
If one of the
following
malfunctions
occur, stop
operation, shut
off the power, and
contact MRCOOL
or your
installation
dealer.
The operation lamp is ashing rapidly (5Hz). This lamp is still ashing
rapidly after turning o the power for 3 minutes and turning it on again.
A safety device such as a fuse or a breaker frequently actuates.
Obstacles and water enter the unit.
Water leaks from indoor unit.
Other malfunctions not covered in the following troubleshooting tables.
CAUTION
Incorrect installation or incorrect voltage could cause above mentioned malfunctions.
Solution
Clean the heat exchanger.
Clean the air filter.
Eliminate all accumulated dust.
Close doors and windows.
Make curtains in order to shelter from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage and rightly recharge refrigerant.
Symptoms Causes
Unit does not start
Air flowing normally but can’t
complete cooling
Units starts or
stops frequently
Low cooling effect
Low heating effect
Outdoor unit and indoor unit heat exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units is blocked.
Doors and windows are open
Sunlight is directly shining into area.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of refrigerant.
Use heating device.
Close doors and windows.
Check leakage and rightly recharge refrigerant.
Outdoor temperature is lower than 44°F
Doors and Windows not completely closed.
Leakage of refrigerant or lack of refrigerant.
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote control may be dead or the
remote may be malfunctioning.
Temperature is not set correctly.
The 3 minute delay protection feature has been activated..
Refrigerant is too little or too much.
Air or no concreting gas in the refrigerating circuit.
Compressor is malfunctioning.
Voltage is too high or too low.
System circuit is blocked.
Wait for the comeback of power.
Switch on the power.
Replace the fuse.
Replace the batteries or check the controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.

Page 10mrcool.com
Troubleshooting
Symptoms Causes
The fan speed can not be
changed.
Check whether the MODE
indicated on the display is
"AUTO"
Check whether the MODE
indicated on the display is
"DRY"
When the automatic mode is
selected, the air conditioner will
automatically change the fan
speed.
When dry operation is selected,
the air conditioner will automatically
change the fan speed. The fan
speed can be selected during
"COOL" , "FAN ONLY", and "HEAT"
The wire controller signal is
not transmitted even when
the ON/OFF button is pushed.
The power supply is off.
No receiving tone sounds
from the indoor unit even
when the ON/OFF button is
pressed.
Check whether the signal
transmitter of the wire
controller is properly directed
to the infrared signal receiver
of the indoor unit when the
ON/OFF button is pressed.
Directly transmit the signal transmitter of
the wire controller to the
infrared signal receiver of the
indoor unit, and then repeatedly
Push the ON/OFF button twice.
The indication on the display
disappears after a lapse of
time.
Check whether the timer
operation has come to an
end when the TIMER OFF
is indicated on the display.
The air conditioner operation will
stop up to the set time
The TIMER ON indicator
goes off after a lapse of
certain time.
Check whether the timer
operation is started when
the TIMER ON is indicated
on the display.
Up to the set time, the
air conditioner will automatically
start and the appropriate
indicator will go off.
The TEMP. indicator does
not come on.
Check whether the MODE
indicated on the display is
FAN ONLY
The temperature cannot be set during
FAN mode.
Solution
Check whether the signal
transmitter of the wire
controller is properly directed
to the infrared signal receiver
of the indoor unit.
Wire Controller Troubleshooting

NO.
Malfunction timer lamp running lamp (flashes per second)
1
2
3
4
5
6
7
8
display (nixie tube)
Refrigerant leakage detection
malfunction
OFF
EC
Water-level alarm malfunction
8
EE
OFF
Outdoor room temperature sensor
open circuit or short circuit F1
2
Outdoor condenser pipe
temperature sensor error
3
4
5
ON
F2
E3
Indoor fan speed malfunction
OFF
E4
Indoor room temperature sensor
open circuit or short circuit
OFF
E5
Evaporator coil temperature
sensor open circuit or short circuit
OFF
E9
Other malfunction of twins model
OFF
9
Communication malfunction
between indoor and outdoor units
OFF
E1
10
11
12
13
Discharging air temperature
sensor error F3
Outdoor EEPROM error F4
Communication malfunction
between two indoor units (for
twins model)
E8
OFF
F0 1
10
9
7
6
5
4
2
1
Current overload protection
Indoor EEPROM error E0
OFF
14
15
16
17
18
19
20
21
22
Outdoor fan speed malfunction
(Only for DC fan motor)
T2b sensor error
F5
F6
6
7
1
2
ON
ON
ON
ON
ON
ON
Inverter module IPM protection P0
Flash
High/Low voltage protection P1
Flash
High temperature protection of
compressor top P2 3
Outdoor low temp. protection P3
4
Compressor drive error P4
5
Mode conflict P5
6
Flash
Flash
Flash
Flash
mrcool.comPage 11 mrcool.com
Troubleshooting
Indoor Unit Error Display

Troubleshooting
Page 12mrcool.com
Problem Time of Occurrence Cause
Mist comes from the
unit.
Unit doesn’t run.
The unit
generates noise.
The unit
emits odor.
The outdoor unit
fan does not spin.
The unit
automatically
changes to fan
mode.
Dust comes from
the unit.
During operation.
When power is turned on.
When unit is started immediately after it
is just turned o.
There is a continuous sound when cooling.
The unit makes a sound when unit
starts or stops.
Slight cracking sound is heard when unit
is turned on.
Electronic expansion valve initialization
can cause this noise temporarily.
There is slight and continuous sound
when unit is running or after running.
When unit runs after no operation for
a long period of time.
During operation.
During cooling mode or heating mode.
If the unit is running under high
humidity, the wet air in the room will be
quickly cooled down.
Overload protection switch causes a 3
minute delay.
Start up could be delayed up to
1 minute.
Gas refrigerant ow can cause a slight noise.
Gas refrigerant ow can cause a slight noise.
The drainage system can cause this
noise during operation.
Dust has settled inside the indoor unit.
During operation. Smells from the operating environment
may be pulled through the air handler.
The speed of the fan is controlled in
order to optimize product operation.
This prevents indoor evaporator
frosting or overheating and will start
back up when the temperature
changes.
(2) The following situations are not operation failures.

Page 13 mrcool.com
Refrigerant Piping Connection
Special notice
This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appli-
ance, the law requires special collection and treatment. DO NOT dispose of this product as household waste
or unsorted municipal waste.
When disposing of this appliance, you have the following options:
• Dispose of the appliance at a designated municipal electronic waste collection facility.
• When buying a new appliance, the retailer will receive the old appliance free of charge.
• The manufacturer will receive the old appliance free of charge.
• Sell the appliance to certified scrap metal dealers.
Disposing of this appliance in the forest or other natural surroundings endangers your health
and is bad for the environment. Hazardous substances may leak into the ground water and
enter the food chain.
5
EU Disposal Guidelines

The design and specifications of this product and/or manual are subject to change without prior notice.
Consult with the sales agency or manufacturer for details.
Olympus Series
Mid-Static Duct Air Handlers